On 11/08/2013 12:15 AM, Jens-Christian Fischer wrote:
Hi all
we have installed a Havana OpenStack cluster with RBD as the backing
storage for volumes, images and the ephemeral images. The code as
delivered in
https://github.com/openstack/nova/blob/master/nova/virt/libvirt/imagebackend.py#L498 fails,
because the RBD.path it not set. I have patched this to read:
Using libvirt_image_type=rbd to replace ephemeral disks is new with
Havana, and unfortunately some bug fixes did not make it into the
release. I've backported the current fixes on top of the stable/havana
branch here:
https://github.com/jdurgin/nova/tree/havana-ephemeral-rbd
* @@ -419,10 +419,12 @@ class Rbd(Image):
* if path:
* try:
* self.rbd_name = path.split('/')[1]
* + self.path = path
* except IndexError:
* raise exception.InvalidDevicePath(path=path)
* else:
* self.rbd_name = '%s_%s' % (instance['name'], disk_name)
* + self.path = 'volumes/%s' % self.rbd_name
* self.snapshot_name = snapshot_name
* if not CONF.libvirt_images_rbd_pool:
* raise RuntimeError(_('You should specify'
but am not sure this is correct. I have the following problems:
1) can't inject data into image
2013-11-07 16:59:25.251 24891 INFO nova.virt.libvirt.driver
[req-f813ef24-de7d-4a05-ad6f-558e27292495
c66a737acf0545fdb9a0a920df0794d9 2096e25f5e814882b5907bc5db342308]
[instance: 2fa02e4f-f804-4679-9507-736eeebd9b8d] Injecting key into
image fc8179d4-14f3-4f21-a76d-72b03b5c1862
2013-11-07 16:59:25.269 24891 WARNING nova.virt.disk.api
[req-f813ef24-de7d-4a05-ad6f-558e27292495
c66a737acf0545fdb9a0a920df0794d9 2096e25f5e814882b5907bc5db342308]
Ignoring error injecting data into image (Error mounting volumes/
instance-0000
0089_disk with libguestfs (volumes/instance-00000089_disk: No such file
or directory))
possibly the self.path = … is wrong - but what are the correct values?
Like Dinu mentioned, I'd suggest disabling file injection and using
the metadata service + cloud-init instead. We should probably change
nova to log an error about this configuration when ephemeral volumes
are rbd.
2) Creating a new instance from an ISO image fails completely - no
bootable disk found, says the KVM console. Related?
This sounds like a bug in the ephemeral rbd code - could you file
it in launchpad if you can reproduce with file injection disabled?
I suspect it's not being attached as a cdrom.
3) When creating a new instance from an image (non ISO images work), the
disk is not resized to the size specified in the flavor (but left at the
size of the original image)
This one is fixed in the backports already.
I would be really grateful, if those people that have Grizzly/Havana
running with an RBD backend could pipe in here…
You're seeing some issues in the ephemeral rbd code, which is new
in Havana. None of these affect non-ephemeral rbd, or Grizzly.
Thanks for reporting them!
Josh
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